Matching Calculation of Turbocharging System Based on Power Recovery at Different Altitudes

doi:10.3969/j.issn.1001-2222.2017.03.015

Vehicle Engine ›› 2017, Vol. 0 ›› Issue (3) : 82-87. DOI: 10.3969/j.issn.1001-2222.2017.03.015

XIE Haijiang1, LI Hualei2, XING Weidong3

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Abstract

For the power recovery of diesel engine, the matching
calculation of wastegate turbocharging system was carried out with the
purpose of boost pressure recovery and the compressor and turbine
characteristic were determined. The performance calculation was carried out
within the operating range of diesel engine at different altitudes and the
boost pressure MAP diagrams were achieved. The control strategies of wastegate valve were determined according to the switching boundary
linesbased on the target boost pressure. The research result show that the
matching scheme can recover the boost pressure at 3
000 m and 0 m, but may overspeed at high altitude and
high speed conditions. With the decrease of altitude, the full torque value of
diesel engine for every speed decreases. In addition, the operating zone of
wastegate valve closing state reduces and that of
wastegate adjusting state increases with the increase
of altitude.

Key words

diesel engine / power recovery / different altitudes / turbocharging system / control strategy

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XIE Haijiang1 LI Hualei, XING Weidong. Matching Calculation of Turbocharging System Based on Power Recovery at Different Altitudes[J]. Vehicle Engine. 2017, 0(3): 82-87 https://doi.org/10.3969/j.issn.1001-2222.2017.03.015